/* 全局样式 */
body {
    font-family: 'Microsoft YaHei', sans-serif;
    line-height: 1.6;
    color: #333;
}

/* 英雄区域 */
.hero-section {
    background: linear-gradient(135deg, #0d6efd, #0dcaf0);
    background-size: cover;
    background-position: center;
    color: white;
    padding: 100px 0;
    margin-bottom: 30px;
}

/* 导航栏 */
.navbar {
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    transition: background-color 0.3s ease;
}

.navbar-scrolled {
    background-color: rgba(33, 37, 41, 0.95) !important;
    box-shadow: 0 4px 10px rgba(0,0,0,0.2);
}

.navbar-brand {
    font-weight: bold;
    font-size: 1.5rem;
}

/* 卡片样式 */
.card {
    transition: transform 0.3s ease;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.card:hover {
    transform: translateY(-5px);
}

.card-title {
    color: #0d6efd;
    font-weight: bold;
}

/* 页脚 */
footer {
    margin-top: 50px;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .hero-section {
        padding: 60px 0;
    }
    
    .display-4 {
        font-size: 2.5rem;
    }
}
